Yea Only my Opinion that it's not a good idea. If I was trying to flush sludge from and engine maybe. But not for the heck of it, especially not in a wet clutch. But what do i know about this?> Nothing. It might clean the clutch plates, who knows? The Lube to cleaning action ratio would be in your favor though eh?

Good oil has enough cleaning agents in it. Maybe just change it out more often until it ran clean longer.

I do know an engineer for GM power train, and he always advises against additives in oil, Always. And he always has tons of info to back up his advice, so. I'd go with what he says. He also says never flush anything, just change fluid. Like Trans and coolant. If something is stuck in a crevice somewhere, leave it there until a rebuild. If you change fluids like you should, nothing will be there to flush.

Just my 2 Cents worth, not scientific facts at all.